Below is a list of Greenfield OK zip codes. For your research we have also included Greenfield Area Code, Time Zone, UTC and the local Blaine County FIPS Code. Each Greenfield Oklahoma zip code has a center Longitude / Latitude point (the Greenfield center is -98.377998352051 / 35.729400634766). For your convenience we have also indicated if that zip code in Greenfield observes Daylight Savings time.